Viessmann KOB PYROTEC, Technical Manual

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6.22 Sound insulation
Braces
To avoid the transmission of structure-borne noise during the opera-
tion of the fuel transportation equipment, the braces and the anchors
of the relevant conveyor device are placed on high quality Sylomer
bases (plastic anti-vibration mounts for noise attenuation) or anchored
with a Sylomer support and a fixing plate in the building structure. The
anchors with heavy load anchors are separated from the braces with
Sylomer washers. Standard delivery:
■ Sylomer washer
■ Sylomer support
■ Sylomer base
■ Fixing plate for the braces of the relevant equipment
Trade name Sound insulation, braces
Type Discharge
conveyor
Screw
conveyor
Supply Spring core
discharge
Horizontal
discharge
Removal of
ash
Flue gas
dust extractor
Part no: 7419 991 7419 992 7419 995 7419 996 7419 997 7419 998 7419 999
Note
■ Depending on the means of fuel transportation, the sound insulation
article should be used once, e.g. 1 AH + 1 sound insulation AH-AS
■ Installation room characteristics relating to the physical building
structure largely determine the transmission of structure-borne noise
in the building. It is important to note that the specified measures do
not offer full sound insulation.
■ Building related measures (brick openings, fire barriers, floating
screeds, etc.) must be coordinated with structural engineers and
architects and are not part of standard delivery and therefore not
within our area of responsibility.
Appendix
7.1 Sizing the expansion vessel
In accordance with EN 12828, water heating systems must be equip-
ped with a diaphragm expansion vessel. The size of the expansion
vessel is subject to the heating system specification and should be
checked in each case. Quick selection table for calculating the vessel size V
n
Safety valve
p
sv
bar 3.0 V
n
Pre-charge
pressure bar 1.0 1.5 1.8 litres
System vol-
ume V
A
litres 220 — — 25
340 200 — 35
510 320 200 50
840 440 260 80
1050 540 330 100
1470 760 460 140
2100 1090 660 200
2630 1360 820 250
3150 1630 990 300
4200 2180 1320 400
5250 2720 1650 500
Selection example
Datum:
p
sv
= 3 bar (response pressure of the safety valve)
H = 13 m (static ceiling of the system)
Q = 18 kW (rated output of the heat source)
v = 8.5 l/kW (specific water capacity)
panel radiators 90/70 °C
V
PH
= 1000 l (volume of buffer cylinder)
The specific water capacity v was determined as follows:
■ Radiators: 13.5 l/kW
■ Panel radiators: 8.5 l/kW
■ Underfloor heating: 20 l/kW
Calculation:
V
A
= Q x v + 1000
V
A
= 18 kW x 8.5 l/kW + 1000 l
= 1153 l
If possible, when calculating the gas pre-charge pressure, select a
supplement of 0.2 bar:
p
0
≥
H/10 + 0.2 bar
p
0
≥
(13/10 + 0.2 bar) = 1.5 bar
From the table:
With p
sv
= 3 bar, p
0
= 1.5 bar, V
A
= 1153 l
V
n
= 250 l (for V
A
max. 1360 l)
Design information
(cont.)
82
PYROTEC
7
5822 511 GB